Lathe-spindle.



PATENTBD'JAN-1, 1907.

Y J. HARTNESS. LATHE SPINDLE. AP1 LI0ATI0N FILED MAY 20.1005.

UNTTED sTA'nes PATENT oEEioE;

JAMES HARTNESS, @E SPRINGFIELD, VERMONT.

` V 1 LATHE-SPINDLE.

Specification of Letters Patent. l

Patented Jan. 1, 190i?.

Original applioationled July 27,1903, `Serial No. 167,068. Divided and this application filed May 26, 1905. Serial No. 262,419. I

To o/ZZ whom it may concern:

Beit known that I, JAMES HARTNEss, of Springfield in the county of-Windsor and State of Vermont, have. invented certain new 5 and useful -Improvements in Lathe-Spindles,

of which the following is a speciiication.l

This invention has relation to lathe-spin- 'dles .such'as may be employed in connection with the lathe illustrated in applicationv[o Serial N0.,167,068,1ed July" 2.7 1903, of

.15 the spindle in plan view. Fig. 2-represents a which this is a division.

On the accompanying drawings, Figure' 1 represents n plan view a portion of a lathestock with the cover removed, so as to show longitudinal section through the same.

On the drawings the head of the latheis indicated at a, and it is constructed substantially as set forth in my copending applicafao tion and is provided with a removable cover,

whichiis not illustratedl Within this head i or casing at the ends are two uprights or supports b b, which are bolted or otherwise secured at their lower ends to the bottom of the z5 casing lor head. These uprights support the journal-boxes for the various shafts and the spindle,'which are arranged in the head..

The spindle is indicated at c. It consists of a hollow shaft having a smooth unshoul- '3o dered periphery or exterior. surface and is adapted to be driven, as will be subsequently explained. Upon one end it is providedwith a chuck c and at its other end mayf be equipped'with a stock-feedin mechanism,

3 5 which I have not illustrated. It

in bearing-boxes dd, which project in opposite directions, each having ya tapering portion which extendsrinto the outwardly-tapering aperture in'one of theupright's b. The

l 4o outer end of each box is reduced and is of a.

cylindrical form to receive a spring e, one end of which bears against the end wall of the head or casing and the other bears against the shoulder d on the box, so. that the'boxes 4 5 are forced yieldingly toward each other into the tapering apertures-in the uprights orsupports. Between each box and the shaft are placed bushings ff of suitable material, the adjacent ends being somewhat separated, as

56 shown, to receive between them a loose ring g, which is adapted VYto rotate in a cav." ty h formed inl the box. This ring assists 'n car- 'ryingthe lubricant which is contained in the 'I cavity to the variousl parts of the bearings. 5 5 Eachboxl d maybe split, and as thespring c is is journaled comparatively strong andv durable the boxes are adjusted to compensate for Wear. v

4Between its ends there isl secured to the sipindle a member, which is indicated at i. t is secured in place` by two screw-pineal i', which extend into lateral apertures formed in the spindle. This member constitutes the common hub of two gears i2 i3, by means of either of which power may be transmitted to the spindle for its rotation. On one side of the gear 't2 there is a flange or web j, which is cast with the casing or head, and between said flange and the end ofthe hub or member i aretwo loosewashers y" y'z. On the opposite side of the hub or member i the casing or head is provided with two upstanding-ears or lugs m, between which the spindle passes.

Through the upper ends of these ears or lugs are passed set-screws m', the inner ends of which bear against loose washers 'n n, interosed between them and the end of the hub y adjusting the screws m the hub or member i may be clamped against axial movement and, by reason of its pinned connection with said spindle, holds said spindle against movement longitudinally of its axis.

Except for the contrivance thus described the spindle is free to move longitudinally of the bearing-boxes, which aretherefore free from all thrust and strain except thatincident to the mere rotation of the spindle.

By withdrawing the screw-pins i a" the spindle may be removed as an entirety from -thlJ head by drawing upon the chuck end thereof.

Having thus explained the nature of the invention and described a way of constructing,` and using the lsame, although without, attempting to set forth all of the forms in which it may 'be'made or all of the modes of its hse, I declare that what. I claimis- 1i In a lathe, a casing, journal-boxes suppored thereby, rigid inwardly-projecting abu ments/on the interior of said casing between aid journal-boxes and independent roo thereof, a live-spindle journaled in'said boxes, and a member fast uponsaid spindle and held against axial movement by said abutments whereby the j ournal-boxes lare relieved from the end thrust of said spindle.

2. Ina lathe, a casing, journal-boxessupported thereby, rigid inwardly-projecting abutments on the interior of said casing between said j ournal-boxes and independent thereof, a live-spindle journaled in said boxes, i io los.

a member fast upon said spindle and held against axial movement by said abutments whereby the j ournal-boxes are relieved from the end thrust of said spindle, and screws interposed between said members and some of the abutments to compensate for wear.

3. Ametal-'working machine comprising a head having supports with tapering apertures, externally-tapering journal-boxes in said apertures, springs for maintaining said boxes in said apertures, a live-spindle journaled in said boxes, and means independent of said boxes and located between them for holding said spindle against axial movement.

4. In a metal-working machine, a head having end walls, supports in said head between the said end walls, journal-boxes in said supports, means located between said end walls and said journal-boxes for adjusting said journal-boxes to compensate for zo y 4 pensating j ournal-boxes in said bearing.

In testimony whereof l have alixed my signature in presence of two witnesses.

JAMES HARTN ESS. 

